Question

Of 500 students going on a class trip 350 are student band members and 65 are athletes 25 band members and student athletes what is the probability that one of the students on the trip is an athlete or a band memeber?

Answer 1

0.78

Explanation:

There are 500 students in total. Thus,

• 350 students are band members;
• 65 students are athlets;
• 25 students are both band members and athlets;
• 350-25=325 students are only band members. not athlets;
• 65-25=40 students are only athlets, not band members.

The probability that one of the students on the trip is an athlete or a band memeber is

`Pr=(325+40+25)/(500)=(390)/(500)=0.78.`